Kooks headers and green cats took my guy about 6 hours. Professional shops might be faster but I trust my installer. You should expect to throw a CEL. Because of the high flow cats, you will get a slow response from the o2 sensors. From what I understand it's no big deal from what I have read. Performance didn't suffer and no knocking. If anything it's smells a little rich now. There are a few work arounds I have read about but haven't tried them yet. A full kooks system sounds amazing. I get compliments all the time.

Kooks headers and green cats took my guy about 6 hours. Professional shops might be faster but I trust my installer. You should expect to throw a CEL. Because of the high flow cats, you will get a slow response from the o2 sensors. From what I understand it's no big deal from what I have read. Performance didn't suffer and no knocking. If anything it's smells a little rich now. There are a few work arounds I have read about but haven't tried them yet. A full kooks system sounds amazing. I get compliments all the time.

I am planning on doing kooks headers in about a month once my gt haus has been delivered. I bet your set up sounds good.